Epoch Timestamp Converter
Convert Unix epoch timestamps to human dates and back — seconds or milliseconds, UTC and local time, with a live clock. Free and 100% client-side.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
Current Unix Timestamp
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Frequently Asked Questions
- What is a Unix timestamp?
- The number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (the "epoch"). It is timezone-independent, which is why databases, APIs, and logs use it as the canonical representation of a moment in time.
- How does the tool tell seconds from milliseconds?
- By magnitude: 10-digit values (like 1735689600) are treated as seconds, and 13-digit values (like 1735689600000) as milliseconds — the JavaScript Date.now() format. The interpretation used is shown with each result.
- What is the year 2038 problem?
- Systems that store Unix time in a signed 32-bit integer overflow on 19 January 2038 at 03:14:07 UTC, wrapping to 1901. Modern 64-bit systems and JavaScript are unaffected, but embedded devices and legacy databases may still be at risk.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.